diff --git a/requirements/lint.txt b/requirements/lint.txt
index f046b6fad..32330f13f 100644
--- a/requirements/lint.txt
+++ b/requirements/lint.txt
@@ -1,5 +1,5 @@
 mypy==0.910; implementation_name=="cpython"
 flake8==3.9.2
 flake8-pyi==20.10.0; python_version >= "3.6"
-black==21.8b0; python_version >= "3.6"
+black==21.9b0; python_version >= "3.6"
 isort==5.9.3